Python if-else Examples

In Python, the if statement test expression is evaluated, and if the result is True, the statement(s) followed by the expression is evaluated; else, if the expression is False, the statement is skipped by the compiler.

But what if we want a separate set of statements to be executed when the expression returns a zero value? In such a case, we use an if-else statement rather than using a simple if statement. Actually, the if-else statement is an extension of the simple if statement.

The general form is:

if(test expression):
  True-block statement(s)
else:
  False-block statement(s)
statement-x

If the test expression is true, then the True-block statement(s) immediately follows if the statement is executed; otherwise, the False-block statement(s) are executed. In either case, either true-block or false-block is executed, not both. In both cases, the control is transferred subsequently to the statement-x.

Python if-else Examples

Example 1:

number=int(input("Enter the value of number:-"))
if(number%2==0):
    print("The number is Even")
else:
    print("The number is Odd")

Output:

Enter the value of number:-89

The number is Odd

Example 2:

char=input("Enter the character:-")
if(char.isalpha()):
    if(char.isupper()):
        print("The entered value is an Alphabet and is in Uppercase")
    else:
         print("The entered value is an Alphabet and is in Lowercase")
else:
    print("The entered value is a digit")

Output:

Enter the character:-A

The entered value is an Alphabet and is in Uppercase